Alarm device or indicator.



No. '77%538. PATEN'ED'DO. 13, 1904. W. PUGKETT.

ALARM DEVICE 0R INDICATR.

` APPLICATION FILED NOV.28.1902. N0 MUDEL.

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NITED STATES Patented December 13, 1904.

PATENT Ormea,

ALARM DEVICE OR INDICATOR..

I SPECIFICATION forming part of Letters Patent N0. 777,538, dated December 13, 1904.

A Application led November 28, 1902. Serial No. 133,041- (Nc model.)

To all whom t may concern:

Be it known that I, VILLIAM Pnoxnrr, a citi- Zen of the United States, residing at Wetzell, in th e county of Antrim and State of Michigan, have invented new and useful Improvements in Alarm Devices or Indicators, of which the following is a specification.

rI`his invention relates to an alarm device for application to an injector or inspirator of a steam-engine; and the object of the same is to provide simple and effective means to automatically notify an engineer or other attendant when an injector or inspirator becomes clogged and fails to operate and avoid injury to a boiler and engine and accident that might otherwise result by failure to perceive under ordinary circumstances the inoperative con dition of an injector or inspirator.

The invention consists in the construction and arrangement of the several parts, which will be more fully hereinafter described and claimed.

In the drawings, Figure lis a side elevation of an alarm or signal device embodying' the features of the invention. Fig. 2 is a transverse vertical section of the same.

Similar numerals of reference are employed to indicate corresponding parts in the views.

The numeral 1 designates a valve-casing having` a lower screw-threaded stem 2, which is adapted to be connected tothe suction-pipe of an injector or inspirator on which the improved alarm or signal device is used. Extending vertically through the stem and a part of the casing above is a bore 3, having an upper contracted extremity 4 opening into the lower extremity of a steam-chamber 5, having a greater diameter than the said bore, the said chamber opening' out through the upper end of the casing 1 and having screwthreads 6 at the upper extremity thereof to receive the lower supporting' member or basepieee 7 of a whistle 8 of usual construction, the said base-piece being formed with a steampassage 9 and a deflecting-cup 10 to cooperate with the lower tubular member 1l of the whistle-stem or upright 12, having' a dellector 13 in operative relation to the lower edge of a whistle-bell 14.

rIhe upper contracted extremity of the bore 3 forms a valve-seat with the lower extremity of the chamber 5, and on said seat a ball-valve 15 closely rests and is free to be elevated in the chamber. To prevent the ball-valve 15 from moving' upwardly too great a distance within the chamber 5, a stop 16 extends transversely through the casing 1 into said cham ber and is in the form of a screw-bolt. W'hen it is desired to clean the casing 1, the screwbolt 16 may be removed and the base 7 de tached, thereby permitting the ball-valve to roll outwardly from the chamber 5 and render the bore 3 and said chamber fully accessible for cleansing' purposes,

W'hen the in jector or inspira-tor kicks or becomes stopped up so that it will not work, the steam will be forced baclrwardly through the suction-pipe and enter the casing 1 through the bore 3 and raise the ball-valve 15 and then pass upwardly through the chamber and operate the whistle. As soon as the stcampres sure in the casing 1 has become expended the ball-valve 15 will drop bach to its seat and closes the said chamber 5 and the bore 3.

The advantage of the present alarm device and the mode of application thereof is that it notifies an attendant or engineer at a time previous to the ordinary low-water signals, and it has been frequently found that the lowwater signals operate too late to avoid injury to a boiler. It will be observed that the present whistlesignal and alarm has but one valve and that controls the passage of the steam through the casing l. The whistle itself is without a valve, and by this means the opera tion ofthe improved device isrendered more sensitive.

To accommodate different applications, changes in the form, proportions, and minor details may be resorted to without departing' from the spirit of the invention.

Having thus fully described the invention, what is claimed as new is An alarm device or indicator comprising a casing having' opposite screw-threaded ends provided with an opening passing' centrally through both ends of the same, said opening being' constructed of two different diameters having at their intersections a concave valveseat, a cup secured to the upper end of the IOO easing having an opening therein communiinto the larger portion ofthe opening therein, eating' with the opening of said easing, a Stem whereby to regulate the upward movement of having a screw-threaded tube at its lower end the ball, substantially as specified.

iieetor mounted on the tube and inolosed with- 4 in the cup, a whistle, and a ball-valve loosely Vitnesses:

mounted in the eoneave valve-seat, and means A. C. FENN, IO extending through the side of the easing and S. I. ROSE.

provided with openings therein, said tube be- VIn testimony whereof 'l aix my signature in 5 ing Secured to the cup and communicating presence of two Witnesses.

with the opening` in the base of the cup, a de- WHJLIAM PUGKETT 

